The primary objective of this study is to evaluate long-term safety and patient acceptability of COMBIVENT RESPIMAT Inhalation Spray as compared to the COMBIVENT Inhalation Aerosol Chlorofluorocarbon-Metered Dose Inhaler (CFC-MDI) and the free combination of ATROVENT Hydrofluoroalkane (HFA) and albuterol Hydrofluoroalkane (HFA) inhalation aerosols.